Sec 2 E Math Mock Paper 2-Q05 - Surveying a flagpole from two positions

Sec 2 E Math Mock Paper 2-Q05 - Surveying a flagpole from two positions

Secondary 2
TGM Original Questions

A surveyor uses an instrument whose lens is 1.6 m above horizontal ground. From a point 25 m from a vertical flagpole, the angle of elevation of its top is \(18^\circ\).

  1. Find the flagpole height.
  2. The surveyor moves to 7 m from the flagpole. Find the new angle of elevation from lens level.

Solution:

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Answer:(a) \(9.72\) m; (b) \(49.2^\circ\).

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